Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: qual é 2011 quando a classificação é inferior a 8 e o parque aquático é ocean world?
 ###Tabelas: CREATE TABLE 2901–3000 (2901–3000_id AUTO_INCREMENT PRIMARY KEY, NGC number INT, Object type VARCHAR, Constellation VARCHAR, Right ascension ( J2000 ) VARCHAR, Declination ( J2000 ) VARCHAR) CREATE TABLE women's_doubles:_10_finals_3_titles_7_runner-ups (women's_doubles:_10_finals_3_titles_7_runner-ups_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Year INT, Championship VARCHAR, Surface VARCHAR, Partner VARCHAR, Opponents in the final VARCHAR, Score in the final VARCHAR) CREATE TABLE series_ratings (series_ratings_id AUTO_INCREMENT PRIMARY KEY, Season INT, # of Episodes INT, Timeslot VARCHAR, Season Premiere VARCHAR, Season Final VARCHAR, Peak Audience INT, Average Audience INT, Average Nightly Rank VARCHAR, Average Weekly Rank VARCHAR, Average Yearly Ranking VARCHAR) CREATE TABLE involvement_in_military_conflicts (involvement_in_military_conflicts_id AUTO_INCREMENT PRIMARY KEY, Start of conflict INT, End of conflict VARCHAR, Conflict VARCHAR, Continent VARCHAR, Location VARCHAR, Branches involved VARCHAR) CREATE TABLE water_parks_in_terms_of_attendance (water_parks_in_terms_of_attendance_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Water park VARCHAR, Location VARCHAR, 2011 INT, 2012 INT)  
SELECT SUM 2011 FROM water_parks_in_terms_of_attendance WHERE Rank < 8 AND Water park = ocean world